**It appears that Iusacell has pulled this .151 from it's download page.
Until we find another .151 carrier, I am placing the unofficial link here to the OS on a non-RIM server. This is the identical file which was hosted by Iusacell. I can verify the file is good, as it is the same from which I upgraded.Alternate download site: Deposit Files

Instructions for installing either version on ANY carrier's 9530:

1. Download the above OS file to the PC then install it to the PC by running (double clicking) the file you downloaded.
2. Go to c:\program files\common files\research in motion\apploader and delete the file named "vendor.xml."
3. Plug in BB and double click on "Loader.exe." It's located in the same place as the above vendor.xml file.

The process takes about 45 minutes to an hour depending on how much data you have to backup and restore during the process. Once it's done loading the new OS it will reboot (it may do this twice during the entire process.) You will see a white screen with an hourglass for up to 20 minutes at a time while the DM says "waiting for initialization."
If, for some reason, you end up with a white screen with small icons and the number 507, simply connect to the PC again and run Loader.exe again and it should load the OS to the device.

Initially after the upgrade, my browser was gone (not the first time that has happened) and I couldn't get a signal at all (yes, the radio was on). Then it crashed after quickly flashing "device error" on the white screen.

However, since booting back up after the crash, everything seems just fine. Memory has definitely increased, and it seems to be holding 1XEV much better. My signal is terrible out here and it usually is constantly going back and forth between 1XEV and 1X, with 1X being the norm. Since the upgrade, almost every time I have checked, it's been on 1XEV, but my signal strength is still right around -100dBm. The poor coverage out here at my house seems to be the main cause for my battery drain, so I'll be keeping an eye on that to see if it has improved at all.

So far, that's about all I've noticed that's different. I couldn't care less about the transitions for opening and closing apps.